body,h1,h2,h3,h4,h5,h6,p,dd {
    margin: 0;

}
ul,ol,dl {
    list-style: none;
    margin: 0;
    padding: 0;
}
img {
    border: none;
    vertical-align: middle;

}
a {
    text-decoration: none;
    outline: none;
    color: inherit;
    cursor: pointer;
}
em {
    /* 标签告诉浏览器把文本强调 但是意味着斜体显示 */
    font-style: normal;
    /* 让文字不倾斜 */
}
input,button {
    border: none;
    outline: none;
}
body {
    background-color: #ededed;
    font: 12px/1.5 'Arial','微软雅黑','sans-serif';
}
.iconfont {
    color: inherit;
}
/* 浮动 */
.fl-l {
    float: left;
}
.fl-r {
    float: right;
}
/* 清除浮动 */
.clearfix::after {
    content: '';
    display: block;
    clear: both;
}
/* 文字居中 */
middle {
    text-align: center;
}
/* 定位 */
.pos-r {
    position: relative;
}
.pos-a {
    position: absolute;
}
.pos-f {
    position: fixed;
}